This piece is drawn with Heisenberg’s Uncertainty Principle,

Schrödinger’s Cat is a thought experiment devised in 1935 in response to Heisenberg’s Uncertainty Principle,
which addressed the inability to accurately predict where and how quickly a particle would be moving.

In Schrödinger’s thought experiment, you place a cat in a steel box which contains a Geiger counter
which holds a very small amount of radioactive substance, so small that perhaps in the course of the hour,
one of the atoms decays, but also, with equal probability, perhaps none.
If it happens, the counter tube discharges, setting off a relay that releases a hammer
and smashes the small vile of poison that kills the cat.

Until an observer opens to box, to see the state of the cat, the cat is both alive and dead.
This is called superposition. It is not until the box is opened that the cat becomes a collapsed state:
either dead or alive.

See also:
Schrödinger’s Cat
Heisenberg’s Uncertainty Principle
Radioactive decay
Geiger counter